The yet-to-be-identified deceased was said to have visited his friend in prison with a substance believed to be cocaine hidden in food items he brought for his friend.
Luck, however, ran out of him when a prison warder, while inspecting the tomatoes and other food items he brought, sighted cocaine among the items and raised the alarm.
The suspect, whose identity could not be immediately ascertained, was subsequently arrested and being interrogated when he allegedly made an attempt to bolt away.
It was learnt that one of the security operatives shot him in the leg as he was attempting to escape.
It was gathered that after demobilising the suspect with the first shot in the leg, the security guard released a second shot killing the crawling suspect in cold blood.
No official of the prison facility could be reached for comment as of the time of filing the report late Tuesday night.